Hugh mcdottgall



(No Model.) 7

H. MODOUGALL.

, MANUFACTURE OF THIMBLES. No. 274,356. Patented Mar. 20,1883.

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UNITED STATES PATENT HUGH MGDOUGALL, 0F new YORK, N. Y.

MANUFACTURE OF THIMBLES.

SPECIFICATION forming part of Letters Patent No. 274,356, dated March20, 1883,

Application filed June 2, 1882. (No model.)

To all whom it may concern Beit known that I, HUGH MCDOUGALL, of Thecity of New York, in the county and State of New York, have inventedcertain new and useful Improvements in the Art of Making 'Thiinbles, ofwhich the following is a specifiblank, and simultaneously turning theedge' outward and producing embossed ornaments upon the exterior of saidblank, and finally cutting off the outwardly-turned portion of saidedge, by turning or otherwise, as more fully hereinafter described.

In the accompanying drawings, Figure 1 is a sectional view of athimble-blank. Fig. 2 is a View of a punch and die which I employ incarrying out my invention, the die being shown in section. Fig. 3represents a plan of my sectional die. Fig. 4 represents a plan ofamodilied form of die. Fig. 5 is an exterior View of the embossedthimble-blank after it has been upset and the flange has been formed.Fig. 6 is a sectional view of the same. Fig. 7 is a a sectional view ofthe thimble after the flange has been cut off.

Similar letters of reference designate corresponding parts in all thefigures, and the drawin gs are made upon an enlarged scale, in order tomore clearly illustrate my invention.

A, Fig. 1, designates the thimbleblank, which may be formed by drawingor other: wise, and which isofuniform thickness th roughout.

B designates the sectional die, as shown in plan in Fig. 3, which iscomposed of three or more sections, B, fitted in a die-holder, B, andengraved upon their'inner surfaces, at f, in a welt-known manner.

0 designates the punch which I employ to produce the upsetting of theend portion of the blank and to form the flange and the embossedornamentation.

If the thimble is to have a polygonal exterior, the cavity in the die Bshould be polygonal in its horizontal section, as shown clearly in Fig.4. The punch O is round, and is provided with a shoulder, a, and in Fig.2 I have represented the die and punch in the positions .whioh they willoccupy when their operation is completed. It will be observed that thepunch is made with a straight taper extending up to the shoulder a,while the cavity in the die is made slightly flaring at the upper part,so that a wider space will be left between the punch and die at theirupper parts than elsewhere. The blank A is placed in the die, and thepunch is then forced into it, and the shoulder (6 acts upon the edge ofthe blank to upset its upper portion, 11, so that it will fill theflaring upper portion of the cavity in the die, and to turn the edgeoutward so as to form a flange, and the punch will also force the metalof the blank into the engrared recesses fof the die, thus forming theembossed ornamentation 6 upon the blank A.

Fig. 5 represents a blank after it has been subjected to the punch anddie, having the embossed ornamentation upon its exterior. The flange cis now out off, by turning or otherwise, and the thimble is left with athickened edge, d, as shown in Fig. 7, and is ready for furtheroperations. The thimble will have a circular interior and a polygonalexterior when formed within a die of the form shown in Fig. 4.

The object of leaving a portion of metal in the-blank to be turnedoutward to form the flange c is to insure the employment of sufiicientmetal to fully fill the die, and which could not be gaged exactly in themaking of the blank.

What I claim as my invention, and desire to secure by Letters Patent,is-

The improvement in the art of making thimbles, consisting in firstproducing a cup-shaped blank, by drawing or otherwise, then upsettingthe end portion of the blank and simultaneously turning the edge outwardand producing embossed ornaments upon the exterior of the blank, andfinally cutting 01f the outwardly-turned portion of said edge, leavingthe thimble with a thickened edge and annular ornamentation,substantially as herein described.

HUGH MGDOUGALL.

Witnesses FRED. HAYNES, ED. L. MORAN.

